Quick-removal cover



Jan. 8 192.4.

J. H; STEBBINS QUIK REMOVAL COVER Filed March l2. 1923 PUIIIII FL'Q. 3.

Patented Jan. 8, 1924.

UNITED'4 STATES JAMES H, 'sTEBBiNs, for WAT'E'nLooQIoWA, AssGNoafro GERGsIDNEVjr C. SMITH.

PATENT oFFicii.ta

n. QUEST AND QUICK-REMOVAL COVER.

Application led March 12,1923.; Serial' No. 624,581.

To all whom t may concer/n Be it known that I, JAMES H. S'rnBBiN's, acitizen of the United States of America, and a resident of Waterloo,Blackhawk County, Iowa, have inventedcertain new 'and usefulImprovements in Quick-Removal Covers, of which the following is aspecification. A My invention relates to improvements in quick-removalcovers,.and the object of my out traps, receptacles, conduits and otherlike structures, a cover Closure therefor and a special locking member,both having' engaging-means, the one for separable engagementwith saidmember, andsaid member for separable engagement with matingengaging-means on'the trap or other structure, whereby both are easilyinterlocked 'with said structure and as easily` disengaged therefrom.

VThis object I have vaccomplished bythe means which are hereinafterdescribed and claimed, and which are illustrated in' the accompanyingdrawingsf in i which n Fig.r` 1 is an elevationof said cover, saidvauxiliary memberi'and theipper'part of a clean-out trap, the top of thetrap being in central vertical section, and the cover separated from thetrap, the auxiliary member bein in endwise mesh with interior threads-othetrap. Fig. 2 is a similar view of said structures, showing the coversecured to the trap by locking engagement with said auxiliary member.Fig. 3 is an under plan view of said cover. Fig. 4 is a horizontalsection of said trap, loolng upwardly, taken on the broken line 4-*4 ofsaid Fig. 2. Fig. 5 is a perspective view of said auxiliary member. f

Closure covers for clean-out traps and other receptacles ko-r containersfor uids have different means for removably locking them in place toelect tight joints. Where such covers have a threaded connection in eachcase with the traps, the relatively extensive area of contact betweenthe threads permits of rust, corrosion, or adhesive lillings in thejoint practically making the joint inseparable without breakage of theparts, or cutting away of the cover. rIhe same defect occurs when thecover has a screw connection to the trap interiorly of the latter wheresubject to corrosion by the vapors or fluid contacts of the contents ofthe trap or other container, and in order to improvement is to supplyfor use on cleanopen the trap to clean it out,'speci'alf. tools have tovlbe forcibly employed, and a skilled workman i summoned, usuallyinjuring `the parts' v l I v. By the employment of 'my improvements,these ditliculties andrlosses are wholly obviated, and the y operationof removing the closure cover yof a trap, or the replacing ot` it`thereon, rendered simple land easy.

The numeral 8 denotes the open upper end of a cleanout trap or'otherluifdcontainer interiorly' threaded for .a limited, distancedownwardly at 9. The' numerall() denotes said auxiliary member,beingxpreferably in the shape of a crossv-barpjof rectangular sectionand havingjits' opposite 4ends shaped with fractional threads vwherebyits said threads llfmay be interni'eshedwith the in- `terior threads 9of ythe trap 8. The Aupper face of saidy cross-barlhas1a shallow pit' orsocket-bearing' l2-for a Ypurpose .to .be de scribed.` f r TheAclosurecover l mayy beof discoidal or other shape,.imperforate'andhaving a squaredycentralstud on its vupper-surface at f24for lengagement by affwrench .-inJthe turning of the cover to and roinl the placing ory removal of the cover.

Depending from kthe underA surface of i said cover Vare a pair ofsegmental arcuate projections 3, separated at opposite ends by arelatively wide opening or split 4,v and onel end of each projectionbeing cut away at 6 to provide a tongue 5, whereby a joint of thebayonet-joint type is provided 4at each of f* vopposite ends of theprojections 3.

The projections have their inner walls formed eccentrically, in order togradually thicken them toward and'including the tongues 5 to strengthenand support them at said joints. A small conical pin or pivotalprojectionv 7 extends downwardly integrally from the center of the underface of the cover l.

The cross-bar isiirst placedin mesh with the threads 9 of the open topof the trap 8, positioning the bar diametrally across the trap. rlhe`cover is secured by inserting the arcuate projectionsinto the trapallowing the barlO to enter'the openings Lhand the cover is then turnedto carry the tongues 5 under the bar interlocking them therewith in thebayonet-joints 6. To remove the cover, it is turned in theoppositedirection, which releases the tongues 5 from the bar 10. -Thebar l0 may then be either removed from the trap, or permitted to remainin mesh, when the contents of the trap are cleaned out, as there issuiiicient clearance space on each side of the bar.

As the areas ot contacts in the meshed joints of the bar ends and thethreadsl 9 are small, any adhesions or corrosions are easily broken whenthe bar is turned either way around.

The bar l0 may be made of brass or noncorrodible material, so that thereis a minimum of corrosion possible. A rubber washer 13 may be mountedaround the arcuateprojections 8 in Contact with the under surface of thecover l to be compressed between the cover and the upper edge ot thetrap 8 to sealvthe joint therebetween.

Having described my invention, what I claimas new, and desire to secureby Letters Patent, is: A

yl. In combination, a container having an interiorly-threaded open end,a cross-,bar having its opposite ends threaded with the threads in meshwith the container threads, and a cover having projections dependinginto thevcontainer on opposite sides of said cross-bar, the projectionseach having a lateral opening to' receive and interlock with thecross-bar releasably.

2. In combination, a container having an interiorlythreaded open end, across-bar having its opposite ends threaded with the threads in meshwith the Container threads, and a cover having arcuate projectionsdepending into the container on opposite sides having a centralpivot-stud tor insertion` vinto said bearing-socket, and having alike 1pair oi' arcuate segmental projections on its lace adjacent thecontainer, said projec-l tions being,r spaced apart at their ends todepend on opposite sides ot'v the cross-bar, an end ot each projectionbeingout away laterally to provide bayonet-joints at loppesite sides otthe cover to releasably receive and interlock with the ends of saidcrossbar vwhen the cover is partially rotated appropriately on its saidpivotal connection to the cross-bar.

1l. ln combinatiom an' open end hollow body, an` impertorate covertherefor having a lateral recess, and a bar having its ends releasablyand adjustably secured within said hollow body andlinterlockingly` andseparably received in the recess ot said cover. `Signed at lVatei-loo,Iowa, this 19th day offFebruary, 1923.

JAMES IH. STEBBINS.`

